Grazing-incidence optical magnetic recording with super-resolution

Gunther Scheunert, Sidney R. Cohen, René Kullock, Ryan McCarron, Katya Rechev, Ifat Kaplan-Ashiri, Ora Bitton, Paul Dawson, Bert Hecht, Dan Oron

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Heat-assisted magnetic recording (HAMR) is often considered the next major step in the storage industry: it is predicted to increase the storage capacity, the read/write speed and the data lifetime of future hard disk drives. However, despite more than a decade of development work, the reliability is still a prime concern. Featuring an inherently fragile surface-plasmon resonator as a highly localized heat source, as part of a near-field transducer (NFT), the current industry concepts still fail to deliver drives with sufficient lifetime. This study presents a method to aid conventional NFT-designs by additional grazing-incidence laser illumination, which may open an alternative route to high-durability HAMR. Magnetic switching is demonstrated on consumer-grade CoCrPt perpendicular magnetic recording media using a green and a near-infrared diode laser. Sub-500 nm magnetic features are written in the absence of a NFT in a moderate bias field of only μ0H = 0.3 T with individual laser pulses of 40 mW power and 50 ns duration with a laser spot size of 3 μm (short axis) at the sample surface - six times larger than the magnetic features. Herein, the presence of a nanoscopic object, i.e., the tip of an atomic force microscope in the focus of the laser at the sample surface, has no impact on the recorded magnetic features - thus suggesting full compatibility with NFT-HAMR.

Original languageEnglish
Pages (from-to)28-37
Number of pages10
JournalBeilstein Journal of Nanotechnology
Volume8
Issue number1
DOIs
Publication statusPublished - 2017

Fingerprint

Magnetic recording
magnetic recording
grazing incidence
Transducers
near fields
transducers
heat
lasers
Lasers
industries
magnetic switching
life (durability)
Hard disk storage
heat sources
durability
compatibility
Semiconductor lasers
Resonators
Laser pulses
grade

Keywords

  • Laser absorption
  • Laser heating
  • Thermally assisted magnetic recording

ASJC Scopus subject areas

  • Materials Science(all)
  • Physics and Astronomy(all)
  • Electrical and Electronic Engineering

Cite this

Scheunert, G., Cohen, S. R., Kullock, R., McCarron, R., Rechev, K., Kaplan-Ashiri, I., ... Oron, D. (2017). Grazing-incidence optical magnetic recording with super-resolution. Beilstein Journal of Nanotechnology, 8(1), 28-37. https://doi.org/10.3762/bjnano.8.4

Grazing-incidence optical magnetic recording with super-resolution. / Scheunert, Gunther; Cohen, Sidney R.; Kullock, René; McCarron, Ryan; Rechev, Katya; Kaplan-Ashiri, Ifat; Bitton, Ora; Dawson, Paul; Hecht, Bert; Oron, Dan.

In: Beilstein Journal of Nanotechnology, Vol. 8, No. 1, 2017, p. 28-37.

Research output: Contribution to journalArticle

Scheunert, G, Cohen, SR, Kullock, R, McCarron, R, Rechev, K, Kaplan-Ashiri, I, Bitton, O, Dawson, P, Hecht, B & Oron, D 2017, 'Grazing-incidence optical magnetic recording with super-resolution', Beilstein Journal of Nanotechnology, vol. 8, no. 1, pp. 28-37. https://doi.org/10.3762/bjnano.8.4
Scheunert G, Cohen SR, Kullock R, McCarron R, Rechev K, Kaplan-Ashiri I et al. Grazing-incidence optical magnetic recording with super-resolution. Beilstein Journal of Nanotechnology. 2017;8(1):28-37. https://doi.org/10.3762/bjnano.8.4
Scheunert, Gunther ; Cohen, Sidney R. ; Kullock, René ; McCarron, Ryan ; Rechev, Katya ; Kaplan-Ashiri, Ifat ; Bitton, Ora ; Dawson, Paul ; Hecht, Bert ; Oron, Dan. / Grazing-incidence optical magnetic recording with super-resolution. In: Beilstein Journal of Nanotechnology. 2017 ; Vol. 8, No. 1. pp. 28-37.
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